The purpose of this Study was to quantify die contribution of support leg joint torques to the generation of the vertical and horizontal acceleration of whole-body center of gravity (e.g.) of skater during inline-roller skating motion. In order to obtain support leg joint torques during single leg support phase in skating motion, an in-shoe thin pressure sensing device (F-Scan mobile) was used to measure plantar pressure distribution on the in-sole for estimation of roller-blade reaction forces. The pressure data was calibrated with the forces obtained by a force platform. The equation of whole-body motion was derived to quantify the contribution of support leg joint torques to the generation of whole-body cg's accelerations, such as vertical acceleration and horizontal accelerations in die forward and side directions. A subject performed a straight skating motion under constant speed condition. The motion was captured with VIC0N-MX motion capture system, and the ground reaction forces were measured with the force platform. From the results obtained in this study show 1) ankle joint torque was a largest contributor to the generation of whole-body cg's acceleration in the vertical and horizontal directions, 2) knee joint torque contributed to the upward, posterior and left-sideward accelerations, and 3) hip joint torque was small contributor to the accelerations in die vertical and horizontal directions.
The Proceedings of Joint Symposium: Symposium on Sports Engineering, Symposium on Human Dynamics
